/**
 * Mirror Ai - Premium Chat Sessions Styles
 * =========================================
 * Styles for the full Chat History view (not sidebar)
 * Premium glass morphism card grid layout
 */

/* ============================================================================
   SESSIONS CONTENT CONTAINER
   ============================================================================ */
#sessions-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    min-height: 100vh;
    padding: 32px;
    gap: 24px;
    background: transparent;
    overflow-y: auto;
    overflow-x: hidden;
}

/* ============================================================================
   SESSIONS HEADER - COMPACT HORIZONTAL
   ============================================================================ */
.sessions-header {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 24px 28px;
    background: linear-gradient(135deg, rgba(20, 26, 50, 0.8) 0%, rgba(15, 21, 41, 0.9) 100%);
    border: 1px solid var(--chat-glass-border, rgba(255, 255, 255, 0.08));
    border-radius: 20px;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.sessions-header-icon {
    width: 56px;
    height: 56px;
    border-radius: 16px;
    background: linear-gradient(135deg, rgba(0, 242, 254, 0.2) 0%, rgba(118, 75, 162, 0.2) 100%);
    border: 1px solid rgba(0, 242, 254, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.sessions-header-icon i {
    font-size: 1.5rem;
    background: linear-gradient(135deg, #00f2fe 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.sessions-header-text h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--chat-text-primary, #ffffff);
    margin: 0 0 4px 0;
}

.sessions-header-text p {
    font-size: 0.9rem;
    color: var(--chat-text-muted, rgba(255, 255, 255, 0.6));
    margin: 0;
}

/* ============================================================================
   SESSIONS STATS - HORIZONTAL PILLS
   ============================================================================ */
.sessions-stats {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.stat-item {
    flex: 1;
    min-width: min(180px, 100%);
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px 24px;
    background: linear-gradient(135deg, rgba(20, 26, 50, 0.7) 0%, rgba(15, 21, 41, 0.8) 100%);
    border: 1px solid rgba(255, 255, 255, 0.09);
    border-radius: 16px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.18);
}

.stat-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, #00f2fe, #764ba2);
    opacity: 0.5;
}

.stat-item:hover {
    border-color: rgba(0, 242, 254, 0.3);
    transform: translateY(-3px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.28), 0 0 24px rgba(0, 242, 254, 0.08);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 14px;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.2) 0%, rgba(118, 75, 162, 0.2) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.stat-icon i {
    font-size: 1.25rem;
    color: var(--chat-accent-primary, #00f2fe);
}

.stat-info {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--chat-text-primary, #ffffff);
    line-height: 1.2;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--chat-text-muted, rgba(255, 255, 255, 0.6));
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ============================================================================
   ALL CONVERSATIONS SECTION
   ============================================================================ */
.sessions-all {
    flex: 1;
}

.sessions-all h4 {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1rem;
    font-weight: 600;
    color: var(--chat-text-secondary, rgba(255, 255, 255, 0.85));
    margin: 0 0 20px 0;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--chat-glass-border, rgba(255, 255, 255, 0.08));
}

.sessions-all h4 i {
    color: var(--chat-accent-primary, #00f2fe);
}

/* Session List - Card Grid */
#session-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(320px, 100%), 1fr));
    gap: 16px;
    list-style: none;
    margin: 0;
    padding: 0;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: rgba(0, 212, 255, 0.3) transparent;
}

#session-list::-webkit-scrollbar {
    width: 5px;
}

#session-list::-webkit-scrollbar-track {
    background: transparent;
}

#session-list::-webkit-scrollbar-thumb {
    background: rgba(0, 212, 255, 0.3);
    border-radius: 3px;
}

/* ============================================================================
   SESSION CARD - PREMIUM DESIGN
   ============================================================================ */
.session-card {
    background: linear-gradient(135deg, rgba(20, 26, 50, 0.8) 0%, rgba(15, 21, 41, 0.9) 100%);
    border: 1px solid rgba(255, 255, 255, 0.09);
    border-radius: 16px;
    padding: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.18);
}

.session-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 3px;
    height: 100%;
    background: linear-gradient(135deg, #00f2fe 0%, #764ba2 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.session-card:hover {
    background: linear-gradient(135deg, rgba(25, 31, 55, 0.9) 0%, rgba(20, 26, 46, 0.95) 100%);
    border-color: rgba(0, 242, 254, 0.25);
    transform: translateY(-4px);
    box-shadow: 
        0 12px 40px rgba(0, 0, 0, 0.3),
        0 0 30px rgba(0, 242, 254, 0.1);
}

.session-card:hover::before {
    opacity: 1;
}

.session-card.active {
    border-color: rgba(0, 242, 254, 0.4);
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
}

.session-card.active::before {
    opacity: 1;
}

/* Session Card Header */
.session-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 12px;
}

.session-card-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--chat-text-primary, #ffffff);
    margin: 0;
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    padding-right: 12px;
}

.session-card-actions {
    display: flex;
    gap: 6px;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.session-card:hover .session-card-actions {
    opacity: 1;
}

.session-card-action {
    background: rgba(255, 255, 255, 0.05);
    border: none;
    color: var(--chat-text-muted, rgba(255, 255, 255, 0.6));
    width: 32px;
    height: 32px;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.session-card-action:hover {
    background: rgba(239, 68, 68, 0.2);
    color: #ef4444;
}

/* Session Card Preview */
.session-card-preview {
    font-size: 0.85rem;
    color: var(--chat-text-muted, rgba(255, 255, 255, 0.6));
    line-height: 1.5;
    margin-bottom: 16px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Session Card Footer */
.session-card-footer {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.session-card-meta {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.75rem;
    padding: 6px 10px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.05);
}

.session-card-meta i {
    font-size: 0.7rem;
}

.session-card-meta.time {
    color: var(--chat-text-subtle, rgba(255, 255, 255, 0.4));
}

.session-card-meta.messages {
    color: var(--chat-accent-primary, #00f2fe);
    background: rgba(0, 242, 254, 0.1);
}

/* ============================================================================
   EMPTY STATE
   ============================================================================ */
.sessions-empty {
    text-align: center;
    padding: 60px 24px;
    color: var(--chat-text-muted, rgba(255, 255, 255, 0.6));
}

.sessions-empty i {
    font-size: 4rem;
    margin-bottom: 20px;
    opacity: 0.4;
    background: linear-gradient(135deg, #00f2fe 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.sessions-empty h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--chat-text-secondary, rgba(255, 255, 255, 0.85));
    margin-bottom: 8px;
}

.sessions-empty p {
    font-size: 0.95rem;
    max-width: 400px;
    margin: 0 auto;
}

/* ============================================================================
   LOADING STATE
   ============================================================================ */
.sessions-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 24px;
    gap: 16px;
}

.sessions-loading .spinner {
    width: 40px;
    height: 40px;
    border: 3px solid rgba(0, 242, 254, 0.2);
    border-top-color: var(--chat-accent-primary, #00f2fe);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.sessions-loading p {
    color: var(--chat-text-muted, rgba(255, 255, 255, 0.6));
    font-size: 0.95rem;
}

/* @keyframes spin defined in design-system.css */

/* ============================================================================
   RESPONSIVE STYLES
   ============================================================================ */
@media (max-width: 1024px) {
    #sessions-content {
        padding: 24px;
    }

    .sessions-stats {
        gap: 12px;
    }

    .stat-item {
        min-width: 160px;
        padding: 16px 20px;
    }

    #session-list {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        gap: 12px;
    }
}

@media (max-width: 767px) {
    #sessions-content {
        padding: 80px 16px 16px;
        gap: 16px;
    }

    .sessions-header {
        padding: 20px;
        border-radius: 16px;
        gap: 16px;
    }

    .sessions-header-icon {
        width: 48px;
        height: 48px;
    }

    .sessions-header-icon i {
        font-size: 1.25rem;
    }

    .sessions-header-text h3 {
        font-size: 1.25rem;
    }

    .sessions-stats {
        flex-direction: column;
    }

    .stat-item {
        min-width: 100%;
        padding: 16px;
    }

    .stat-icon {
        width: 44px;
        height: 44px;
    }

    .stat-value {
        font-size: 1.5rem;
    }

    #session-list {
        grid-template-columns: 1fr;
    }

    .session-card {
        padding: 16px;
    }

    .session-card-actions {
        opacity: 1;
    }
}

@media (max-width: 480px) {
    #sessions-content {
        padding: 70px 12px 12px;
    }

    .sessions-header {
        padding: 16px;
        flex-direction: column;
        text-align: center;
    }

    .stat-item {
        padding: 14px;
        gap: 12px;
    }

    .stat-icon {
        width: 40px;
        height: 40px;
    }

    .stat-icon i {
        font-size: 1rem;
    }

    .stat-value {
        font-size: 1.25rem;
    }
}

/* ============================================
   SIDEBAR SESSIONS - Keep existing compact styles
   ============================================ */
.sidebar-sessions {
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 0;
    flex-shrink: 0;
}

/* ============================================
   SIDEBAR SESSIONS HEADER
   ============================================ */
.sidebar-sessions-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    flex-shrink: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.sidebar-sessions-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.7rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.45);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.sidebar-sessions-title i {
    font-size: 0.65rem;
    color: rgba(0, 240, 255, 0.5);
}

.sidebar-sessions-refresh {
    width: 26px;
    height: 26px;
    border: none;
    background: transparent;
    border-radius: 6px;
    color: rgba(255, 255, 255, 0.4);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.sidebar-sessions-refresh:hover {
    background: rgba(0, 240, 255, 0.1);
    color: var(--quantum-cyan, #00f0ff);
}

.sidebar-sessions-refresh.refreshing i {
    animation: spin 1s linear infinite;
}

/* @keyframes spin - now centralized in design-system.css */

/* @keyframes slideInRight and slideOutRight — centralized in shared-ui.css */

/* ============================================
   SESSIONS LIST CONTAINER
   ============================================ */
.sidebar-sessions-list {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 0.5rem;
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.1) transparent;
}

.sidebar-sessions-list::-webkit-scrollbar {
    width: 4px;
}

.sidebar-sessions-list::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar-sessions-list::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
}

.sidebar-sessions-list::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* ============================================
   DATE GROUP HEADERS
   ============================================ */
.sidebar-sessions-date-group {
    padding: 0.625rem 0.75rem 0.375rem;
    font-size: 0.6rem;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.3);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-top: 0.5rem;
}

.sidebar-sessions-date-group:first-child {
    margin-top: 0;
}

/* ============================================
   SESSION ITEM - Compact Card
   ============================================ */
.sidebar-session-item {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    padding: 0.625rem 0.75rem;
    margin-bottom: 0.125rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.15s ease;
    position: relative;
    background: transparent;
    border: 1px solid transparent;
}

.sidebar-session-item:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.06);
}

.sidebar-session-item.active {
    background: linear-gradient(135deg, rgba(0, 240, 255, 0.08), rgba(139, 92, 246, 0.08));
    border-color: rgba(0, 240, 255, 0.15);
}

.sidebar-session-item.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 50%;
    background: linear-gradient(180deg, var(--quantum-cyan, #00f0ff), var(--quantum-purple, #8b5cf6));
    border-radius: 0 2px 2px 0;
}

/* Session Icon */
.sidebar-session-icon {
    width: 28px;
    height: 28px;
    border-radius: 6px;
    background: linear-gradient(135deg, rgba(0, 240, 255, 0.12), rgba(139, 92, 246, 0.12));
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.sidebar-session-icon i {
    font-size: 0.7rem;
    color: rgba(0, 240, 255, 0.8);
}

/* Session Content */
.sidebar-session-content {
    flex: 1;
    min-width: 0;
    overflow: hidden;
}

.sidebar-session-title {
    font-size: 0.8rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.85);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 1.3;
    margin-bottom: 0.125rem;
}

.sidebar-session-meta {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.65rem;
    color: rgba(255, 255, 255, 0.35);
}

.sidebar-session-time {
    white-space: nowrap;
}

.sidebar-session-count {
    display: flex;
    align-items: center;
    gap: 0.2rem;
}

.sidebar-session-count i {
    font-size: 0.55rem;
}

/* Session Actions (Delete button) - Show on hover */
.sidebar-session-actions {
    display: flex;
    align-items: center;
    opacity: 0;
    transition: opacity 0.15s ease;
}

.sidebar-session-item:hover .sidebar-session-actions {
    opacity: 1;
}

.sidebar-session-delete {
    width: 24px;
    height: 24px;
    border: none;
    background: transparent;
    border-radius: 4px;
    color: rgba(239, 68, 68, 0.6);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s ease;
}

.sidebar-session-delete:hover {
    background: rgba(239, 68, 68, 0.15);
    color: #ef4444;
}

.sidebar-session-delete i {
    font-size: 0.65rem;
}

/* ============================================
   LOADING STATE
   ============================================ */
.sidebar-sessions-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem 1rem;
    color: rgba(255, 255, 255, 0.4);
    font-size: 0.75rem;
    gap: 0.625rem;
}

.sidebar-sessions-loading i {
    font-size: 1.1rem;
    color: rgba(0, 240, 255, 0.6);
}

/* ============================================
   EMPTY STATE
   ============================================ */
.sidebar-sessions-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem 1rem;
    text-align: center;
}

.sidebar-sessions-empty-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: linear-gradient(135deg, rgba(0, 240, 255, 0.08), rgba(139, 92, 246, 0.08));
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 0.75rem;
}

.sidebar-sessions-empty-icon i {
    font-size: 1rem;
    color: rgba(0, 240, 255, 0.4);
}

.sidebar-sessions-empty-title {
    font-size: 0.8rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 0.25rem;
}

.sidebar-sessions-empty-text {
    font-size: 0.7rem;
    color: rgba(255, 255, 255, 0.35);
    line-height: 1.5;
    max-width: 180px;
}

/* ============================================
   ERROR STATE
   ============================================ */
.sidebar-sessions-error {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem 1rem;
    text-align: center;
}

.sidebar-sessions-error-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: rgba(239, 68, 68, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 0.75rem;
}

.sidebar-sessions-error-icon i {
    font-size: 1rem;
    color: rgba(239, 68, 68, 0.6);
}

.sidebar-sessions-error-title {
    font-size: 0.8rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 0.25rem;
}

.sidebar-sessions-error-text {
    font-size: 0.7rem;
    color: rgba(255, 255, 255, 0.35);
    line-height: 1.5;
    margin-bottom: 0.625rem;
}

.sidebar-sessions-retry {
    padding: 0.375rem 0.75rem;
    border: none;
    background: rgba(0, 240, 255, 0.1);
    border-radius: 4px;
    color: var(--quantum-cyan, #00f0ff);
    font-size: 0.7rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s ease;
}

.sidebar-sessions-retry:hover {
    background: rgba(0, 240, 255, 0.2);
}

/* ============================================
   AUTH REQUIRED STATE
   ============================================ */
.sidebar-sessions-auth {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem 1rem;
    text-align: center;
}

.sidebar-sessions-auth-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.1), rgba(236, 72, 153, 0.1));
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 0.75rem;
}

.sidebar-sessions-auth-icon i {
    font-size: 1rem;
    color: rgba(139, 92, 246, 0.6);
}

.sidebar-sessions-auth-title {
    font-size: 0.8rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 0.25rem;
}

.sidebar-sessions-auth-text {
    font-size: 0.7rem;
    color: rgba(255, 255, 255, 0.35);
    line-height: 1.5;
}

/* ============================================
   SIDEBAR FOOTER
   ============================================ */
.sidebar-footer {
    padding: 0.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    flex-shrink: 0;
}

.sidebar-footer-item {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    padding: 0.5rem 0.75rem;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.15s ease;
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.8rem;
}

.sidebar-footer-item:hover {
    background: rgba(255, 255, 255, 0.05);
    color: rgba(255, 255, 255, 0.8);
}

.sidebar-footer-item i {
    font-size: 0.85rem;
    width: 16px;
    text-align: center;
}

/* ============================================
   NOTIFICATIONS
   ============================================ */
.sidebar-notification {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: var(--z-toast, 1300);
    min-width: 260px;
    max-width: 360px;
    padding: 0.875rem 1rem;
    background: rgba(17, 24, 39, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
    animation: notificationSlideIn 0.25s ease-out;
}

@keyframes notificationSlideIn {
    from {
        opacity: 0;
        transform: translateX(100%) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateX(0) scale(1);
    }
}

.sidebar-notification.hiding {
    animation: notificationSlideOut 0.25s ease-out forwards;
}

@keyframes notificationSlideOut {
    from {
        opacity: 1;
        transform: translateX(0) scale(1);
    }
    to {
        opacity: 0;
        transform: translateX(100%) scale(0.95);
    }
}

.sidebar-notification-icon {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.sidebar-notification.success .sidebar-notification-icon {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.2), rgba(16, 185, 129, 0.1));
    color: #10b981;
}

.sidebar-notification.error .sidebar-notification-icon {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.2), rgba(239, 68, 68, 0.1));
    color: #ef4444;
}

.sidebar-notification.info .sidebar-notification-icon {
    background: linear-gradient(135deg, rgba(0, 240, 255, 0.2), rgba(139, 92, 246, 0.1));
    color: #00f0ff;
}

.sidebar-notification-content {
    flex: 1;
}

.sidebar-notification-message {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.4;
}

.sidebar-notification-close {
    width: 24px;
    height: 24px;
    border: none;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 4px;
    color: rgba(255, 255, 255, 0.4);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s ease;
}

.sidebar-notification-close:hover {
    background: rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
}

/* ============================================
   DELETE MODAL STYLES
   ============================================ */
.delete-modal {
    max-width: 380px;
    background: #111827;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 14px;
}

.delete-modal .modal-header {
    padding: 1rem 1.25rem;
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.08), transparent);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.delete-modal .modal-header-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, #ef4444, #b91c1c);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.delete-modal .modal-header-icon i {
    font-size: 0.9rem;
    color: white;
}

.delete-modal .modal-header h2 {
    font-size: 1rem;
    font-weight: 600;
    color: white;
    margin: 0;
}

.delete-modal .modal-body {
    padding: 1.25rem;
}

.delete-modal .warning-box {
    background: rgba(239, 68, 68, 0.06);
    border: 1px solid rgba(239, 68, 68, 0.15);
    border-radius: 8px;
    padding: 0.875rem;
    margin-bottom: 1rem;
    display: flex;
    gap: 0.75rem;
}

.delete-modal .warning-box i {
    color: #ef4444;
    font-size: 1rem;
    flex-shrink: 0;
    margin-top: 0.1rem;
}

.delete-modal .warning-box div {
    flex: 1;
}

.delete-modal .warning-box strong {
    display: block;
    color: #ef4444;
    font-weight: 600;
    font-size: 0.85rem;
    margin-bottom: 0.2rem;
}

.delete-modal .warning-box p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.8rem;
    line-height: 1.4;
    margin: 0;
}

.delete-modal .session-info-box {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 8px;
    padding: 0.875rem;
}

.delete-modal .session-info-box p {
    display: flex;
    justify-content: space-between;
    margin: 0.25rem 0;
    font-size: 0.8rem;
}

.delete-modal .session-info-box strong {
    color: rgba(255, 255, 255, 0.6);
}

.delete-modal .session-info-box span {
    color: rgba(255, 255, 255, 0.4);
}

.delete-modal .modal-footer {
    padding: 0.875rem 1.25rem;
    background: rgba(0, 0, 0, 0.15);
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    display: flex;
    justify-content: flex-end;
    gap: 0.5rem;
}

.delete-modal .btn {
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
}

.delete-modal .btn-secondary {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: rgba(255, 255, 255, 0.7);
}

.delete-modal .btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
}

.delete-modal .btn-danger {
    background: linear-gradient(135deg, #ef4444, #b91c1c);
    border: none;
    color: white;
}

.delete-modal .btn-danger:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.35);
}

.delete-modal .btn-danger:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 767px) {
    .sidebar-session-item {
        padding: 0.5rem 0.625rem;
    }
    
    .sidebar-session-icon {
        width: 26px;
        height: 26px;
    }
    
    .sidebar-session-title {
        font-size: 0.75rem;
    }
    
    .sidebar-session-actions {
        opacity: 1;
    }
    
    .sidebar-notification {
        left: 16px;
        right: 16px;
        min-width: auto;
    }
}

/* ============================================
   FULL-PAGE CHAT HISTORY - NEW LAYOUT
   ============================================ */

/* REMOVED DUPLICATE: #sessions-content definition moved to lines 11-24 */
/* Single source of truth for sessions content container */

/* ============================================
   COMPACT HEADER
   ============================================ */
.sessions-header {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    padding: 1.5rem 2rem;
    background: linear-gradient(135deg, 
        rgba(0, 212, 255, 0.06) 0%, 
        rgba(139, 92, 246, 0.06) 100%);
    border-radius: 16px;
    border: 1px solid rgba(0, 212, 255, 0.12);
    flex-shrink: 0;
}

.sessions-header-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, #00d4ff, #8b5cf6);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.sessions-header-icon i {
    font-size: 1.5rem;
    color: #ffffff;
}

.sessions-header-text {
    flex: 1;
}

.sessions-header h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 0 0.25rem 0;
    color: #ffffff;
}

.sessions-header p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.875rem;
    margin: 0;
}

/* ============================================
   INLINE STATS - Horizontal Pills
   ============================================ */
.sessions-stats {
    display: flex;
    gap: 1rem;
    flex-shrink: 0;
    flex-wrap: wrap;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    padding: 0.875rem 1.25rem;
    transition: all 0.2s ease;
    flex: 1;
    min-width: 160px;
}

.stat-item:hover {
    border-color: rgba(0, 212, 255, 0.25);
    background: rgba(0, 212, 255, 0.05);
}

.stat-icon {
    width: 42px;
    height: 42px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.stat-item:nth-child(1) .stat-icon {
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.2), rgba(0, 212, 255, 0.1));
}

.stat-item:nth-child(1) .stat-icon i {
    color: #00d4ff;
}

.stat-item:nth-child(2) .stat-icon {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.2), rgba(139, 92, 246, 0.1));
}

.stat-item:nth-child(2) .stat-icon i {
    color: #8b5cf6;
}

.stat-item:nth-child(3) .stat-icon {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.2), rgba(16, 185, 129, 0.1));
}

.stat-item:nth-child(3) .stat-icon i {
    color: #10b981;
}

.stat-icon i {
    font-size: 1.125rem;
}

.stat-info {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: #ffffff;
    line-height: 1.2;
}

.stat-label {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.5);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ============================================
   CONVERSATIONS & SESSION LIST
   ============================================
   NOTE: .sessions-all and #session-list base styles are defined above
   at lines 141-169 (single source of truth). Duplicate definitions
   were removed to prevent CSS cascade conflicts.
   ============================================ */

/* ============================================
   SESSION CARD - NEW DESIGN
   ============================================ */
.session-item {
    background: linear-gradient(145deg, 
        rgba(30, 41, 59, 0.8) 0%, 
        rgba(15, 23, 42, 0.6) 100%);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 16px;
    padding: 1.25rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    position: relative;
    overflow: hidden;
    min-height: 160px;
}

/* Top gradient accent */
.session-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #00d4ff, #8b5cf6);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.session-item:hover {
    border-color: rgba(0, 212, 255, 0.2);
    transform: translateY(-4px);
    box-shadow: 
        0 16px 48px rgba(0, 0, 0, 0.3),
        0 0 0 1px rgba(0, 212, 255, 0.1);
}

.session-item:hover::before {
    opacity: 1;
}

/* Card Header - Icon + Title */
.session-card-header {
    display: flex;
    align-items: flex-start;
    gap: 0.875rem;
}

.session-icon {
    width: 44px;
    height: 44px;
    min-width: 44px;
    background: linear-gradient(135deg, 
        rgba(0, 212, 255, 0.15) 0%, 
        rgba(139, 92, 246, 0.1) 100%);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.session-icon i {
    font-size: 1.125rem;
    color: #00d4ff;
}

.session-item:hover .session-icon {
    background: linear-gradient(135deg, 
        rgba(0, 212, 255, 0.25) 0%, 
        rgba(139, 92, 246, 0.15) 100%);
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.2);
}

/* Session Info */
.session-info {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
}

/* Session Menu - Three Dots */
.session-menu {
    position: relative;
    flex-shrink: 0;
    margin-left: auto;
}

.session-menu-btn {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: transparent;
    border: 1px solid transparent;
    color: rgba(255, 255, 255, 0.4);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.session-menu-btn:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.8);
}

.session-menu-btn:focus-visible {
    outline: 2px solid var(--color-accent-cyan, #00f2fe);
    outline-offset: 2px;
}

.session-menu-btn.active {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
    color: #ffffff;
}

.session-menu-btn i {
    font-size: 0.875rem;
}

.session-menu-dropdown {
    position: absolute;
    top: calc(100% + 4px);
    right: 0;
    background: linear-gradient(135deg, 
        rgba(30, 41, 59, 0.98) 0%, 
        rgba(51, 65, 85, 0.98) 100%);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    padding: 0.375rem;
    min-width: 140px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4),
                0 0 0 1px rgba(255, 255, 255, 0.05) inset;
    z-index: var(--z-dropdown, 100);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.session-menu-dropdown.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.session-menu-item {
    width: 100%;
    padding: 0.625rem 0.875rem;
    border: none;
    background: transparent;
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.875rem;
    text-align: left;
    cursor: pointer;
    border-radius: 6px;
    display: flex;
    align-items: center;
    gap: 0.625rem;
    transition: all 0.15s ease;
}

.session-menu-item:hover {
    background: rgba(239, 68, 68, 0.15);
    color: #ef4444;
}

.session-menu-item i {
    font-size: 0.875rem;
    width: 16px;
}

.session-menu-item span {
    flex: 1;
}

.session-title {
    font-size: 1rem;
    font-weight: 600;
    color: #ffffff;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
}

.session-preview {
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.5);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-top: 0.375rem;
}

/* Card Footer - Date + Count + Actions */
.session-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: auto;
    padding-top: 0.75rem;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.session-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.session-date {
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.4);
    display: flex;
    align-items: center;
    gap: 0.375rem;
}

.session-date i {
    font-size: 0.75rem;
    opacity: 0.7;
}

.session-count {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    font-size: 0.8125rem;
    font-weight: 600;
    color: #00d4ff;
    background: rgba(0, 212, 255, 0.1);
    padding: 0.375rem 0.75rem;
    border-radius: 20px;
}

.session-count i {
    font-size: 0.75rem;
}

/* Session Actions */
.session-actions {
    display: flex;
    gap: 0.5rem;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.session-item:hover .session-actions {
    opacity: 1;
}

.session-action-btn {
    width: 34px;
    height: 34px;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.05);
    color: rgba(255, 255, 255, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
}

.session-action-btn i {
    font-size: 0.8125rem;
}

.session-action-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #ffffff;
}

.session-action-btn.delete:hover {
    background: rgba(239, 68, 68, 0.15);
    border-color: rgba(239, 68, 68, 0.3);
    color: #ef4444;
}

/* ============================================
   EMPTY STATE
   ============================================ */
.sessions-empty {
    grid-column: 1 / -1;
    text-align: center;
    padding: 4rem 2rem;
    color: rgba(255, 255, 255, 0.5);
}

.sessions-empty-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px dashed rgba(255, 255, 255, 0.15);
}

.sessions-empty-icon i {
    font-size: 2rem;
    color: rgba(255, 255, 255, 0.25);
}

.sessions-empty h4 {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.7);
    margin: 0 0 0.5rem 0;
}

.sessions-empty p {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.5);
    margin: 0;
}

/* ============================================
   LOADING STATE
   ============================================ */
.sessions-loading {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 4rem;
    gap: 1rem;
}

.sessions-loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid rgba(0, 212, 255, 0.2);
    border-top-color: #00d4ff;
    border-radius: 50%;
    animation: fullPageSpin 1s linear infinite;
}

@keyframes fullPageSpin {
    to { transform: rotate(360deg); }
}

.sessions-loading-text {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.875rem;
}

/* Action buttons in empty states */
.sessions-empty-action {
    margin-top: 1.5rem;
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg,
        rgba(99, 102, 241, 0.8),
        rgba(139, 92, 246, 0.8)
    );
    border: none;
    border-radius: 8px;
    color: white;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.sessions-empty-action:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(99, 102, 241, 0.3);
}

.sessions-empty-action:active {
    transform: translateY(0);
}

.sessions-empty-action i {
    font-size: 1rem;
}

/* ============================================
   DELETE MODAL
   ============================================ */
.session-delete-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal, 1050);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1), 
                visibility 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    animation: fadeIn 0.3s ease-out forwards;
}

.session-delete-modal.active {
    opacity: 1;
    visibility: visible;
}

.session-delete-modal-content {
    background: linear-gradient(135deg, 
        rgba(30, 41, 59, 0.98) 0%, 
        rgba(51, 65, 85, 0.98) 100%);
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: 16px;
    padding: 2.5rem;
    max-width: 440px;
    width: 90%;
    text-align: center;
    transform: scale(0.95) translateY(20px);
    opacity: 0;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4),
                0 0 0 1px rgba(255, 255, 255, 0.05) inset;
}

.session-delete-modal.active .session-delete-modal-content {
    transform: scale(1) translateY(0);
    opacity: 1;
}

.session-delete-modal-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 1.5rem;
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.15), rgba(220, 38, 38, 0.1));
    border: 2px solid rgba(239, 68, 68, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: deleteIconPulse 2s ease-in-out infinite;
}

/* Renamed from iconPulse to avoid collision with workspace.css iconPulse (scale based) */
@keyframes deleteIconPulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.4);
    }
    50% {
        box-shadow: 0 0 0 8px rgba(239, 68, 68, 0);
    }
}

.session-delete-modal-icon i {
    font-size: 1.75rem;
    color: #ef4444;
}

.session-delete-modal h4 {
    font-size: 1.5rem;
    font-weight: 700;
    color: #ffffff;
    margin: 0 0 1rem 0;
    letter-spacing: -0.02em;
}

.session-delete-modal p,
.session-delete-modal .delete-modal-message {
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.7);
    margin: 0 0 2rem 0;
    line-height: 1.6;
}

.session-delete-modal .delete-modal-message strong {
    color: rgba(255, 255, 255, 0.95);
    font-weight: 600;
}

.session-delete-modal-actions {
    display: flex;
    gap: 0.875rem;
    justify-content: center;
}

.session-delete-modal-btn {
    padding: 0.875rem 2rem;
    border-radius: 12px;
    font-size: 0.9375rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    border: none;
    min-width: 120px;
    position: relative;
    overflow: hidden;
}

.session-delete-modal-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.session-delete-modal-btn:active::before {
    width: 300px;
    height: 300px;
}

.session-delete-modal-btn.cancel {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.05));
    color: rgba(255, 255, 255, 0.9);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.session-delete-modal-btn.cancel:hover {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.15), rgba(255, 255, 255, 0.08));
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.session-delete-modal-btn.cancel:active {
    transform: translateY(0);
}

.session-delete-modal-btn.delete {
    background: linear-gradient(135deg, #ef4444, #dc2626);
    color: #ffffff;
    box-shadow: 0 4px 15px rgba(239, 68, 68, 0.3);
}

.session-delete-modal-btn.delete:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(239, 68, 68, 0.5);
    background: linear-gradient(135deg, #f87171, #ef4444);
}

.session-delete-modal-btn.delete:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(239, 68, 68, 0.4);
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

/* Tablet */
@media (max-width: 1023px) {
    #session-list {
        grid-template-columns: 1fr;
    }
    
    .sessions-stats {
        flex-wrap: wrap;
    }
    
    .stat-item {
        min-width: calc(50% - 0.5rem);
    }
}

/* Mobile */
@media (max-width: 767px) {
    #sessions-content {
        padding: 1rem;
        gap: 1rem;
    }
    
    .sessions-header {
        flex-direction: column;
        text-align: center;
        padding: 1.25rem;
        gap: 1rem;
    }
    
    .sessions-header h3 {
        font-size: 1.25rem;
    }
    
    .sessions-stats {
        flex-direction: column;
    }
    
    .stat-item {
        min-width: 100%;
    }
    
    .stat-value {
        font-size: 1.25rem;
    }
    
    .sessions-all h4 {
        font-size: 0.9375rem;
    }
    
    .session-item {
        padding: 1rem;
        min-height: 140px;
    }
    
    .session-icon {
        width: 40px;
        height: 40px;
        min-width: 40px;
    }
    
    .session-icon i {
        font-size: 1rem;
    }
    
    .session-title {
        font-size: 0.9375rem;
    }
    
    .session-preview {
        font-size: 0.75rem;
        -webkit-line-clamp: 1;
        line-clamp: 1;
    }
    
    .session-actions {
        opacity: 1;
    }
    
    .session-card-footer {
        flex-wrap: wrap;
        gap: 0.5rem;
    }
    
    .session-meta {
        flex: 1;
        min-width: 100%;
        order: 2;
    }
    
    .session-actions {
        order: 1;
        margin-left: auto;
    }
}

/* Small Mobile */
@media (max-width: 480px) {
    #sessions-content {
        padding: 0.75rem;
    }
    
    .sessions-header {
        padding: 1rem;
    }
    
    .sessions-header-icon {
        width: 48px;
        height: 48px;
    }
    
    .sessions-header-icon i {
        font-size: 1.25rem;
    }
    
    .sessions-header h3 {
        font-size: 1.125rem;
    }
    
    .session-item {
        padding: 0.875rem;
        gap: 0.75rem;
    }
    
    .session-delete-modal-content {
        padding: 2rem;
        max-width: 340px;
        border-radius: 12px;
    }
    
    .session-delete-modal-icon {
        width: 64px;
        height: 64px;
        margin-bottom: 1.25rem;
    }
    
    .session-delete-modal-icon i {
        font-size: 1.5rem;
    }
    
    .session-delete-modal h4 {
        font-size: 1.25rem;
    }
    
    .session-delete-modal-actions {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .session-delete-modal-btn {
        width: 100%;
        min-width: unset;
    }
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.session-item {
    animation: fadeInUp 0.35s ease forwards;
    opacity: 0;
}

.session-item:nth-child(1) { animation-delay: 0.03s; }
.session-item:nth-child(2) { animation-delay: 0.06s; }
.session-item:nth-child(3) { animation-delay: 0.09s; }
.session-item:nth-child(4) { animation-delay: 0.12s; }
.session-item:nth-child(5) { animation-delay: 0.15s; }
.session-item:nth-child(6) { animation-delay: 0.18s; }
.session-item:nth-child(7) { animation-delay: 0.21s; }
.session-item:nth-child(8) { animation-delay: 0.24s; }
.session-item:nth-child(9) { animation-delay: 0.27s; }
.session-item:nth-child(10) { animation-delay: 0.30s; }

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {
    #sessions-content {
        padding: 0;
    }
    
    .sessions-header::before,
    .session-actions,
    .session-delete-modal {
        display: none !important;
    }
    
    .session-item {
        break-inside: avoid;
        border: 1px solid #ccc;
        background: #fff !important;
    }
    
    .session-title,
    .session-preview,
    .stat-value,
    .stat-label {
        color: #000 !important;
    }
}

/* ============================================================================
   PREMIUM CALM REFRESH (2026-06-18) — single authoritative source for the
   Chat History view. Scoped under #sessions-content so it beats the earlier
   duplicate + mobile rules (incl. `html body …`) on specificity (id) AND source
   order. Calms the maximalist gradients / glows / animated accent bars and
   unifies on brand cyan (#00f2fe), matching the answer cards + sidebar.
   ============================================================================ */

/* --- Header: clean glass surface; solid-cyan icon (no gradient-text clip) --- */
#sessions-content .sessions-header {
    background: rgba(255, 255, 255, 0.025);
    border: 1px solid rgba(255, 255, 255, 0.07);
    border-radius: 18px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.22);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
}
#sessions-content .sessions-header-icon {
    background: rgba(0, 242, 254, 0.08);
    border: 1px solid rgba(0, 242, 254, 0.18);
    border-radius: 14px;
    box-shadow: none;
}
#sessions-content .sessions-header-icon i {
    background: none;
    -webkit-background-clip: border-box;
    background-clip: border-box;
    -webkit-text-fill-color: #00f2fe;
    color: #00f2fe;
}

/* --- Stat pills: calm cards, no animated accent bar, subtle hover --- */
#sessions-content .stat-item {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.07);
    border-radius: 14px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.16);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    transition: background 0.16s ease, border-color 0.16s ease, transform 0.16s ease, box-shadow 0.16s ease;
}
#sessions-content .stat-item::before { display: none; }
#sessions-content .stat-item:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(0, 242, 254, 0.22);
    transform: translateY(-1px);
    box-shadow: 0 8px 22px rgba(0, 0, 0, 0.22);
}
/* Per-stat accent kept, but as calm flat tints (not gradients) */
#sessions-content .stat-icon { border-radius: 11px; box-shadow: none; }
#sessions-content .stat-item:nth-child(1) .stat-icon {
    background: rgba(0, 242, 254, 0.09); border: 1px solid rgba(0, 242, 254, 0.16);
}
#sessions-content .stat-item:nth-child(1) .stat-icon i { color: #00f2fe; }
#sessions-content .stat-item:nth-child(2) .stat-icon {
    background: rgba(139, 92, 246, 0.10); border: 1px solid rgba(139, 92, 246, 0.18);
}
#sessions-content .stat-item:nth-child(2) .stat-icon i { color: #a78bfa; }
#sessions-content .stat-item:nth-child(3) .stat-icon {
    background: rgba(16, 185, 129, 0.10); border: 1px solid rgba(16, 185, 129, 0.18);
}
#sessions-content .stat-item:nth-child(3) .stat-icon i { color: #34d399; }

/* --- Session cards: calm surface, no top accent bar / cyan halo --- */
#sessions-content .session-item {
    background: rgba(255, 255, 255, 0.025);
    border: 1px solid rgba(255, 255, 255, 0.07);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.16);
    transition: background 0.16s ease, border-color 0.16s ease, transform 0.16s ease, box-shadow 0.16s ease;
}
#sessions-content .session-item::before { display: none; }
#sessions-content .session-item:hover {
    background: rgba(255, 255, 255, 0.045);
    border-color: rgba(0, 242, 254, 0.22);
    transform: translateY(-2px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.26);
}
#sessions-content .session-icon {
    background: rgba(0, 242, 254, 0.08);
    border: 1px solid rgba(0, 242, 254, 0.16);
}
#sessions-content .session-icon i { color: #00f2fe; }
#sessions-content .session-item:hover .session-icon {
    background: rgba(0, 242, 254, 0.12);
    box-shadow: none;
}
#sessions-content .session-count {
    color: #00f2fe;
    background: rgba(0, 242, 254, 0.09);
    border-radius: 8px;
}

/* --- Empty + loading: brand cyan, calm --- */
#sessions-content .sessions-empty-icon i,
#sessions-content .sessions-empty i { color: rgba(255, 255, 255, 0.3); -webkit-text-fill-color: rgba(255, 255, 255, 0.3); background: none; }
#sessions-content .sessions-loading-spinner {
    border-color: rgba(0, 242, 254, 0.2);
    border-top-color: #00f2fe;
}

/* --- "Back to chat" button in the Chat History header --- */
#sessions-content .sessions-back-btn {
    margin-left: auto;
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    background: rgba(0, 242, 254, 0.08);
    border: 1px solid rgba(0, 242, 254, 0.2);
    border-radius: 11px;
    color: #cfeff5;
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.16s ease, border-color 0.16s ease, color 0.16s ease;
}
#sessions-content .sessions-back-btn:hover {
    background: rgba(0, 242, 254, 0.14);
    border-color: rgba(0, 242, 254, 0.35);
    color: #ffffff;
}
#sessions-content .sessions-back-btn i { font-size: 0.8rem; }